Enhanced Virtualmin password driver

[Hal9000]

Hi there!
I would like to contribute with this patch, since the Virtualmin driver of the password plugin assumes that usernaes are in email format, which is not always the case.
The patch provides a configuration option for the username format.

At the bottom of config.inc.php.dist add

// Virtualmin Driver options
// -------------------------
// Usernames format:
// 0: username@domain
// 1: username%domain
// 2: username.domain
// 3: domain.username
// 4: username-domain
// 5: domain-username
// 6: username_domain
// 7: domain_username
$rcmail_config['virtualmin_format'] = 0;

In drivers/virtualmin.php replace

$domain = substr(strrchr($username, "@"), 1);

with the following code

	$format = $rcmail->config->get('virtualmin_format', false);
	switch ($format) {
		case 1: // username%domain
			$domain = substr(strrchr($username, "%"), 1);
			break;
		case 2: // username.domain (could be bogus)
			$pieces = explode(".", $username);
			$domain = $pieces[count($pieces)-2]. "." . end($pieces);
			break;
		case 3: // domain.username (could be bogus)
			$pieces = explode(".", $username);
			$domain = $pieces[0]. "." . $pieces[1];
			break;
		case 4: // username-domain
			$domain = substr(strrchr($username, "-"), 1);
			break;
		case 5: // domain-username
			$domain = str_replace(strrchr($username, "-"), "", $username);
			break;
		case 6: // username_domain
			$domain = substr(strrchr($username, "_"), 1);
			break;
		case 7: // domain_username
			//$domain = substr(strstr($username, "_", true), 0); # only works with php 5.3
			$pieces = explode("_", $username);
			$domain = $pieces[0];
			break;
		default: // username@domain
			$domain = substr(strrchr($username, "@"), 1);
	}

[Hal9000]

Did a little mistake: in the code for virtualmin.php, right at the start, the following line is needed:

$rcmail = rcmail::get_instance();

And at the end it would be a good idea to have this:

write_log('password', "Changing password for $username on $domain");

[alec]

Applied in r4546/svn. Not tested, feedback welcome.